Device for removing yarn remainders from coil cores

ABSTRACT

Device for removing yarn remainders from coil cores includes yarn stripping means accommodated to the diameter of a respective coil core, the coil core and the yarn stripping means being relatively displaceable in the direction of the longitudinal axis of the coil core, the yarn stripping mean including means for guiding the relative displacement of the coil core and the yarn stripping means in pilgrim stepwise manner.

United States Patent Kupper Apr. 16, 1974 [54] DEVICE FOR REMOVING YARN 1,097,943 5/1914 Rhoades 28/20 RE AINDERS FRO COIL C ES 1,183,116 5/1916 Rhoades 28/20 M M OR 1,761,695 6/1930 Utsman 28/20 [75] Inventor: W li ppe R el th. Ge many 2,036,405 4/1936 Gale 28/20 ASSigHeeI Schlafhorst & Co. FOREIGN PATENTS OR APPLICATIONS Monchengladbach Germany 669,425 12/1938 Germany 28/20 [22] Filed: July 8, 1971 Primary Examiner-Robert R. Mackey 0 7 [211 App] NO 16 7 Attorney, Agent, or FirmHerbert L. Lerner [30] Foreign Application Priority Data 57] ABSTRACT July 8, 1970 Germany 2033718 Device for removing yarn remainders from coil cores 52 US. (:1. 28/20 includes yam Stripping means accommodated to the 51 Int. Cl D03d 45/58 diameter of a reslhective coil core, the coil core and 58 Field of Search 28/20, 19 the Yam stripping means being relatively displaceahle in the direction of the longitudinal axis of the coil [56] References Cited core, the yarn stripping mean including means for UNITED STATES PATENTS guiding the relative displacement of the coil, core and the yarn stripping means in pilgrim stepwise manner 993,422 5/1911 Walker 28/20 1,097,942 5/1914 Rhoades 28/20 5 Claims, 4 Drawing Figures DEVICE FOR REMOVING YARN REMAINDERS FROM COIL (IORES The invention relates to a device for removing yarn remainders from coil cores and, more particularly, to such devices having yarn stripping means accommodated to the diameter of a respective coil core, the yarn stripping means and the coil core being relatively displaceable in the direction of the longitudinal axis of the coil core.

Devices of this general type have as their function to make coil cores of all types employed in the textile industry reusable by removing therefrom all yarn remainders still adhering thereto which have not been completely used up during the working process or whose further processing is no longer profitable.

Besides devices for removing yarn remainders operating with rotary blades, brushes or the like which may cause damage to the coil cores, other devices have becomeknown heretofore wherein the yarn remainder still wound on a widely and conventionally used conical core is forced against a yarn stripper accommodated to the respective diameter of the core and is shoved off in one step. This has the disadvantage, though, that the yarn windings located especially in the vicinity of the foot of the coil core are frequently caught under the edge of the yarn stripper instead of being located in front of the latter and remain hanging on the shaft of the coil core, so that the yarn remainder cannot be completely removed from the core.

It is accordingly an object of the invention to provide a device for removing yarn remainders from coil cores which avoids the foregoing disadvantages of the heretofore known devices of this general type. More specifically, it is an object of the invention to provide such a device which will not cause damage to the core proper and which will remove the yarn remainder from each coil core completely and efficiently.

With the foregoing and other objects in view, there is provided, in accordance with theinvention, a device for removing a yarn remainder from a coil core comprising yarn stripping means accommodated to the diameter of a respective coil core, the coilcore and the yarn stripping means being relatively displaceable in the direction of the longitudinal axis of the coil core, the yarn stripping means including means for effecting the relative displacement of the coil core and the yarn stripping means in pilgrim stepwise manner. By pilgrim stepwise relative displacement of the coil core and yarn stripping means there is meant herein that, for example, the coil core, with the yarn remainder wound thereon is initially shoved to a given extent against a stationary yarn stripper whereby the yarn remainder is compressed, forced along for a short distance and, thereafter, the coil core is reversed in direction for such distance with respect to the yarn stripper as to provide a reliably yam-free intermediate space between the edge of the yarn stripper and the edge of the yarn remainder, the foregoing movements being repeatedly carried out in succession. Due to the formation of the yam-free intermediate space, the remainder yarns caught between the core shaft and the yarn stripper are time and again freed during the shoving or shifting operation and, in the subsequent shoving stroke are reliably engaged by the yarn stripper and further shoved along the shaft of the coil core.

The removal of a yarn remainder loosened from a coil core shaft by the pilgrim stepwise relative displacement of a coil core and yarn stripper can be appreciably accelerated by a blast of air current directed toward the yarn remainder and/or a suction device for taking up the yarn remainder coordinated with the free end of the coil core.

In accordance with another feature of the invention, the yarn stripping means comprises a plurality of yarn strippers each having separate means for guiding relative displacement of the coil core and the respective yarn stripper in the pilgrim stepwise manner.

In accordance with a further feature of the invention the yarn strippers are serially disposed along a line substantially perpendicular to the longitudinal axis of the coil core for successively acting upon the yarn remainder on the coil core, the guiding means of each of the yarn strippers comprising a member having guiding contours for guiding the coil core relative to the respective yarn stripper. The possibility thereby arises, for example, to build-in the device of the invention in the path of conveyance between two processing stations for textile coils. An accordingly applied cyclical afterconveyance of the coil cores is especially suited to take the core from yarn stripper to yarn stripper and for performing the shoving or displacement stroke with respect to the individual yarn strippers during a feeding pause or interval. As the coil core is being further conveyed from yarn stripper to yarn stripper, it is shoved back so far in reverse direction by the guide contoured members coordinated with the yarn strippers as to provide a spacing between the respective yarn stripper edge and the yarn remainder edge that is necessary for effecting complete removal of the yarn remainder.

In accordance with an additional feature of the invention, the yarn stripping means comprises a stationary stop member, and a displaceable stop member movable into a position wherein it has a surface substantially coplanar with a surface of the stationary stop member, each of the stop members being formed with substantially semicircular notches in the surfaces thereof, respectively, both of the stop members together constituting an apertured partition having a substantially circular aperture formed by both of the substantially semicircular notches. The coilcores can consequently slide over the stationary stop member of the yarn stripper forming the lower half of the aperturcd partition, while the upper movable stop member of the stripper moves aside. The spacing of both stop members of the stripper relative to one another, as well as the size of the semicircular notches or recesses, are of such dimension that, especially for conical coil cores the greatest possible lines of contact at the periphery of the core shaft, even for relatively large deviations in diameter, are provided.

The movable stop member is turnable about a center of rotation so disposed that any force applied by the yarn remainder on the movable stop member produces no lifting component but rather a component directed toward the core shaft. It is furthermore advantageous, in accordance with the invention, to provide a plunger engageable with the tip of the coil core for displacing the coil core in the axial direction thereof through the yarn stripper The advantages attained by the invention of this application are especially that all heretofore known types of yarn remainders on coil cores, irrespective of the region of the core on which they are wound or stuck, can be removed rapidly and reliably without damaging the coil cores.

Other features which are considered as characteristic for the invention are set forth in the appended claims.

Although the invention is illustrated and described herein as embodied in a device for removing yarn remainders from coil cores, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.

' The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of a specific embodiment when read in connection with the accompanying drawing, in which:

FIG. 1 is a side elevational view of the device for removing yarn remainders from coil cores according to the invention;

FIG. 2 is a fragmentary, enlarged top plan view of FIG. 1;

FIG. 3 is a fragmentary end elevational view of FIG. 2 as seen from the right hand side thereof; and

FIG. 4 is a side elevational view of a detail of FIG. 2.

Referring now to the drawings and first, particularly, to FIG. 1 thereof, there is shown a device for removing yarn remainders from coil cores according to the invention which includes an upright frame wall 1 on which rollers 2, 3 and 4 are rotatably mounted. The roller 2 is driven stepwise in the direction of the arrow 6 by a suitable transmission or gear train and accordingly displaces a conveyor belt 7 provided with coil-carrying troughs 8 in direction of the arrow 9. Adjacent the roller 2 there is provided a supply container 10 for coil cores 1 I wound with yarn remainders 13, such as partly depleted spinning cops 01' the like; A conveyor belt 12 is located below the roller 4 which supplies the coil cops 11. On their path to'the conveyor belt 12, the coil cores l1 initially drop into the troughs 8 from the supply. container 10 and are fed by the conveyor belt 7 stepwise to yarn strippers 14. In the embodiment illustrated in FIG. 1 as well as FIG. 2, four yarn strippers 14 are located one-after the other and are formed of a lower stationary part 15 and upper pivotally mounted parts 16 which are beveled at one side thereof (note FIG. 4) and are thereby able to be raised by the coil cores 1 1 proper as the latter are transported from one stripper 14 to the other. The ends of the coil cores 11 are all maintained at the same level by a guide rail 17. An air nozzle 18 is located above the roller 4 and blows a yarn remainder, that has been loosened by the strippers 14, in direction toward a collecting hopper or funnel 19 whose collecting capability may be enhanced by providing air suction flow therethrough. The collecting hopper 19 is connected by a pipe 20 with a receptacle 21 from which accummulating yarn remainders can be removed from time to time. The forced air flow blown through the nozzle 18 and suction air flow drawn through the collecting hopper 19 are produced by a fan or blower 22. In the interest of clarity, those members which press the ends of the coil cores 11 against the yarn strippers 14 are not shown in FIG. 1.

In the enlarged fragmentary view of FIG. 2, the members pressing the ends of the coil cores 1] against the yarn strippers 14 are shown as being reciprocating rams or plungers 23. The stroke or travel displacements of these plungers 23, which are represented by doubleheaded arrows 24, are capable of being produced by conventional devices such as cam discs or the like, for example. In FIG. 2 there are shown in greater detail the coil cores ll wound with yarn remainder 13, as well as the aforementioned troughs 8, into which the coil cores 11 are fed, which are secured to the conveyor belt 7. The yarn strippers 14 in the embodiment shown in the drawing are disposed in series along a line extending in the direction perpendicular to the axes of the coil cores 11 as the latter are carried in the troughs 8, and the pivotable members 16 of the strippers 14 are pivotably mounted on a shaft 25. Each of the strippers 14 is coordinated with a stop member 26 having a guiding contour 27. As is readily apparent from FIG. 2, the coil cores ll progress from the right-hand side to the lefthand side of the figure in direction of the arrow 9, as the conveyor belt 7 and the troughs 8 carried thereby and containing the coil cores 1 1 move in that direction. In the initial position of the coil core 11 at the righthand side of FIG. 2, the foot of the coil core is located in the first yarn stripper 14 at the right-hand side of the figure. The coil core foot is shoved by the plunger 23 against the stop member 26 into the position 11' thereof shown in phantom. The yarn remainder 13 carried by the coil core 11 is prevented by the members 15 and 16 of the stripper 14from sliding with the coil core end toward the position 1 l thereof and the windings thereof are caused to slide together somewhat and to loosen. In the next stage of the conveyor belt 7 in direction of the arrow 9, the foot of the coil core 11 is guided back along the guiding contour 27 to the position shown at the second stripper 14 on the right-hand side of FIG. 2. Due to the pilgrim step displacement produced thereby, an intermediate space 28 is formed 7 between the members 15 and 16, on the one hand, and

the bunched-up windings of the yarn remainder, on the other hand. The intermediate space 28 is thus either free of yarn or affords space for threads that have fallen between the members 15 and 16 of the stripper 14 when the coil core 11 was inserted or when the yarn remainder 13 was initially bunched together by the first stripper 14. In the succeeding pilgrim step-like stripping movements even these threads of the yarn remainder are reliably shoved away by the front side of the next succeeding stripper 14. The process is repeated with the next-following strippers 14, which can be of such number as to ensure the loosening of all possible types of yarn remainder windings from the shaft of the coil core when it has passed the last stripper 14. As can be seen in FIG. 2, after the last yarn stripper 14 from the right-hand side of the figure, the coil core 11 remains in its trough 8 on the conveyor belt 7 while the previously loosened yarn remainder is blown by an'air curent from the nozzle 18 towards and into the collecting hopper 19. As is readily apparent, the conically narrowing shape of the coil cores 11 from foot to tip thereof facilitates the loosening and removing of the yarn remainders since the diameters of the originally wound turns thereof appear increasingly greater to the decreasing diameter of the conical core 14 as the yarn remainders are initially shoved by the yarn strippers l4 and then by the air jet from the nozzle 18 toward the narrowing tip of the core 14.

As previously indicated the stroke of plungers 23 are capable of being produced by conventional devices such as cam discs or the like. For example the stroke movements of plungers 23 may be carried out in the direction of the double arrow 24, indicated in FIG. 3, by cam discs 32 which are affixed to a shaft 33. The plungers 23 are mounted for axial movement in bearing blocks 34 and are biased against the cam discs 32 by means of pressure springs 35. The shaft 33 is rotatably mounted in bearing blocks 36 and may be driven off of the gear train 5 shown in FIG. 1 through a drive member 37 and a pulley or disc 38 in synchronism with the conveyor belt 7.

In FIG. 3 there is shown in end view especially clearly how the coil core 11 is guided during the yarn stripping operation. The foot of the coil core 11 is disposed between the stationary member 15 and the pivotable member 16 of a yarn stripper l4, and the core tip is supported on the guide rail 17. It is noted, moreover, that the center of rotation of the shaft is so disposed that the force exerted by the yarn remainder 13 against the pivotable member 16 cannot raise the latter from the shaft of the coil core 11 because a moment acting in a direction toward the shaft of the coil core 1 1 is produced.

In FIG. 4, it is shown that the members 15 and 16 of the yarn stripper 14 are formed with respective recesses 29 and 30 thereby constituting together an apertured partition. A slit or gap 31 located between the members 15 and 16 affords the pivotable member 16 an opportunity to accommodate itself to the varied diameter of the shaft of a conical coil core.

I claim:

1. In a device for removing a yarn remainder from a coil core, a plurality of mutually spaced yarn stripping means accommodated to the diameter of a respective coil core, means for advancing the coil core from one to another of said plurality of yarn stripping means, means for effecting relative displacement between said coil core and each of said stripping means in one direction parallel of the longitudinal axis of the coil core to loosen said yarn remainder on said coil core, the relative displacement between the coil core and the respective stripping means being successively greater as the coil core is advanced from one to another thereof, and guide means for effecting relative displacement between said coil core and each of said stripping means in an opposite direction to thereby effect pilgrim stepwise displacement of said coil core and said yarn stripping means. i

2. In a device according to claim 1 wherein each of said yarn stripping means comprises a stationary stop member, and a displaceable stop member movable into a position wherein it has a surface substantially coplanar with a surface of said stationary stop member, each of said stop members being formed with substantially semicircular notches in said surfaces thereof, respectively, both of said stop members together constituting an apertured partition having a substantially circular aperture formed by both of said substantially semicircular notches.

3. In a device according to claim 1, wherein each of said guide means comprises a contoured element engaging the longitudinal end of said coil core, said contoured element having one portion offset relative to another portion thereof in' a direction parallel to the longitudinal axis of said coil core.

4. In a device according to claim 1, wherein each of said yarn stripping means have separate means for effecting relative displacement of the coil core and the respective yarn stripping means.

5. In a device according to claim 4, wherein each of said yarn stripping means are serially disposed along a line substantially perpendicular to the longitudinal axis of the coil core for successively acting upon the yarn remainder on the coil core, said guide means being provided for effecting relative displacement between each of said coil cores and each of said yarn stripping means and comprising a respective member having guiding contours for guiding and displacing the coil core relative to the respective yarn stripping means. 

1. In a device for removing a yarn remainder from a coil core, a plurality of mutually spaced yarn stripping means accommodated to the diameter of a respective coil core, means for advancing the coil core from one to another of said plurality of yarn stripping means, means for effecting relative displacement between said coil core and each of said stripping means in one direction parallel of the longitudinal axis of the coil core to loosen said yarn remainder on said coil core, the relative displacement between the coil core and the respective stripping means being successively greater as the coil core is advanced from one to another thereof, and guide means for effecting relative displacement between said coil core and each of said stripping means in an opposite direction to thereby effect pilgrim stepwise displacement of said coil core and said yarn stripping means.
 2. In a device according to claim 1 wherein each of said yarn stripping means comprises a stationary stop member, and a displaceable stop member movable into a position wherein it has a surface substantially coplanar with a surface of said stationary stop member, each of said stop members being formed with substantially semicircular notches in said surfaces thereof, respectively, both of said stop members together constituting an apertured partition having a substantially circular aperture formed by both of said substantially semicircular notches.
 3. In a device according to claim 1, wherein each of said guide means comprises a contoured element engaging the longitudinal end of said coil core, said contoured element having one portion offset relative to another portion thereof in a direction parallel to the longitudinal axis of said coil core.
 4. In a device according to claim 1, wherein each of said yarn stripping means have separate means for effecting relative displacement of the coil core and the respective yarn stripping means.
 5. In a device according to claim 4, wherein each of said yarn stripping means are serially disposed along a line substantially perpendicular to the longitudinal axis of the coil core for successively acting upon the yarn remainder on the coil core, said guide means being provided for effecting relative displacement between each of said coil cores and each of said yarn stripping means and comprising a respective member having guiding contours for guiding and displacing the coil core relative to the respective yarn stripping means. 